Burglar-alarm.



No. 823,831, PATENTED JUNE 19, 1906;

I. WATKINS.

v BURGL-AR ALARM.

APPLICATION FILED JULY 12, 1905.

BMW: 5 G MHAM cm. FMOTO-LITHOGMPNERS. wnymqrcm n. c

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented June 19, 1906.

Application filed July 12, 1905. Serial No. 269,316.

To all whom it may concern.- Be it known that I,IsAAC WATKINS, a citizenof the United States, and a resident'of Hartford, in the county ofHartford and State of Connecticut, haveinvented and produced a new andImproved Burglar-Alarm, of which the following is a specification.

My invention relates to that class of devices which are attached to orin connection with a window or door and which are operated on opening ofthe window or door to sound an alarm; and the object of myinvention isto provide a device in which a single alarm may serve for a pluralnumber of win- :t 5 dows or doors; and a'further object of the inventionis to provide a device that maybe applied to structures of differentdimensions and a further object of the invention is to provide a devicethat, while certainly indicating window or door to open the same, shallallow the door or window to be closed without sounding the alarm. Oneform of device in the use of which these objects may be at-' tained isillustrated 'in the accompanying drawings, in which- Figure 1 is a view,partially diagrammatic, showing in elevation a part of twowindow framesand sashes provided with, my improved attachment. Fig. 2 is a detailviewshowing a modified form of the trip-lever. Fig. 3 is a detail plan viewof the trip-platesupporting arm. Fig. 4 is a diagrammatic viewillustrating the application of my invention employing a number ofsounding devices for a single gong. Fig. 5 isa detail :view showing theslot in the pawl.

- In the accompanying drawings the numeral 1 denotes a ortion of aWindow-frame, and 2 a sash to w ich my attachment is-applied. Atrip-plate 3 is attached to the win- ,dow-sashby means of an adjustableconnection including a base 4, which is secured to the "sash, having asocket 5. An arm 6'is adjustably. secured to this socket, a clamp-.screw 7- being employed to lock the arm in any desired position. Thisarm 6 is of angular shape, as shown in Fig. 3, and has secured thereon asocket-piece 8, to which the tripplate 3 is secured. It will thus beseen that the trip-plate support is a sectional structure consisting: ofthe socket-pieces 5 and Sand .the arm 6. The socket-piece 8 may be.clamped on the arm 6 in any desired position by means of theclamp-screw 9. A trip-le by sounding of the alarm the movement of a Iver 10 is mounted on a pivot 11 on the window-frame, this trip-leverbearing a pawl 12 on the end adapted to engage trips 13 on thetrip-plate 3. These trips may be arranged with any desired intervalbetween them and in any desired number. A stop 14-limits the downwardmovement of the trip-lever 10, the pawl 12 being located normally in thepath of movement of the trips 13. This pawl has a socket for thereception of the trip-lever 10, on which it has a sliding movement, aspring 15 holdin the pawl normally at the outer limit of its p ay. Anangularlyshaped slot 16 is located in the pawl, in which a pin 17 fromthe trip-lever is located. The '70 pawl is inserted in place by movingit endwise, the pin 17 passing along the slot to the inner portionthereof located at one side of the mouth of the slot. When it is desiredto disconnect the alarm, the pawl may be moved 7 5 back and turned,locating the pin in the angular portion of the inner end of-the slot.

In the modified form of the device shown in Fig. 2 the trip-lever 18 hasa swinging awl 19 on its outer end. This edge 20 engaging with a stop 21to prevent upward movement of the outer end of the pawl and compel thelever to move upward with the pawl. This pawl yields, however, to allowthe trips 13 to pass in a downward 85 movement of the sash, and a spring22 returns the pawl to its normal position. v

The trip-lever 10 is connected, as by means of a cord or other flexibleconnection 23, with a striker 24. As shown in Fig. 1, flexi- 9o bleconnections from a. number of trip-levers may be attached to a singlestriker 24. This striker is ivoted in proximity to agong 25 and is puled toward the gong, as by means of a spring 26. 5

In the operation of the device as the window is raised the trip 13,engaging the pawl on one of the levers 10, pulls on the connection 23,drawing the striker awayfrom the gong. Whenthe sash has been raisedsuffiroo ciently, the pawl slips from the trip and the spring 26 drawsthe striker against the gong, sounding an alarm.

In Fig. 4 of the drawings a single gong 27 is employed, around which arelocated a IO 5 number of striker-arms 28. These are operated in a mannersimilar to the striker-arm shown in Fig. 1, and itis obvious that thepull on the cords 29 may be obtained in the .same manner as. shown inFig. 1 or in any rro pawl has a other desired manner. An indicator 30 islocated appurtenant to each of the levers 28, this indicator consistingof a case 31, in which is located a slide 32, havin a stem 33 lying inthe path of movement of the arm 28. The slide 32 bears a numbercorresponding to the room from which a connection to the lever apurtenant to this slide extends, and this s ide normally rests withinthe case, as shown at the upper part of Fig, 4. If a window shall beraised in a room, the movement of the lever 28 to sound the alarmstrikes the stem 33 moving the plate outward, as shown at thestriker-arm located at the lower part of Fig. 4.

From the above description, taken in connection with the drawings, itwill be seen that my improved device may be readily attached to anywindow without regard to the thickness of the window-frame or the widthof the sash, the parts being readily adjusted to accommodate windows orframes of different dimensions.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. An alarm, a striker appurtenant thereto, a trip-plate provided Withmeans of atteehment to a movable part and healing l l i tries, atrip-lever lnterpesed 1n the petli of movement of the trip-plate andhaving a pawl to compel movement of the lever in the movement of thetrip-plate in one direction but yielding to allow movement of the triplate in the opposite direction, and a lengt wise-movable connectionbetween the triplever and striker.

2. A trip-plate bearing a number of trips and arranged to be secured toa movable part, a trip-lever bearing a pawl compellin move ment of thelever in one direction 0' movement of the trip-plate, but yielding toallow it to pass in a movement in the opposite direction, a gong with astriker appurtenant thereto, and means on said striker for directattachment of lengthwise-movable connections with a plural number oftrip-levers.

3. 'In an alarm device, a base with means of attachment to a movablepart and having a socketiece, an arm adjustably mounted in the socet-piece, a trip-plate borne by said arm and having a trip, a trip-leverhaving a pawl located in the path of movement of said trip, said pawlyielding to permit movement of the trip in one direction but unyieldingin the movement of the trip in the opposite direction, a gong, a strikertherefor, and con nections between said striker and trip-lever.

4. In an alarm device, a base having means for attachment to a movablepart, an arm supported by the base, a trip plate having a socketieceadjustably mounted on said arm and earing a trip, a trip-lever having apawl located in the path of movement of said trip and yielding to allowmovement of the trip in one direction but unyielding in the movement ofthe trip in the opposite direction, a gong, a striker therefor, andconnections between said striker and trip-leverv 5. In an alarm device,a base provided with attachment to a movable part and having asocket-piece, an arm adjustably mounted in said socket-piece, atrip-plate having a socket-piece adjustably mounted on said arm andbearing a trip, a triflever having a pawl located in the path ofmovement of said trip and yielding in the movement of the trip in onedirection but unyielding in its movement in the opposite direction, analarm, a striker therefor, and 0011- nections between said striker andtrip-lever.

6. In an alarm device, a trip-plate provided with means for attachmentto a movable member and provided with a trip, a trip-lever, a pawlyieldingly mounted on the trip-lever and movable lengthwise thereof, analarm, a striker therefor, and connections between the trip-lever andstriker.

7. In an alarm device, in combination with a gong, a swinging strikertherefor, means for operating the striker, and an i11d icator consisting of a case with a slide therein having a stem located in thepath. of movement of the stake.

8. in an alarm device, a gong, a plural number of striker-arms arrangedabout the gong, means for operating said arms, and an indicatorappurtenant to each arm and including a case with a plate slidabletherein having a stem projecting through the case into the path ofmovement of the strikerarm.

9. In an alarm device, a base with means of attachment to a movable partand having a socketiece, an arm adjustably mounted in the soc ct-piece,a trip-plate borne by said arm and having a trip, a trip-lever bearing apawl to be engaged by the trip, a gong, a striker therefor, andconnections between said striker and trip-lever.

10. In an alarm device, a base having means for attachment to a movablepart, an arm supported by the base, a trip-plate having a socket-pieceadjustably mounted on said arm and bearing a trip, a trip-lever having apawl located in the path of movement of said trip, a gong, a strikertherefor, and connections between said striker and triplever.

11. In an alarm device, a base provided with attachment to a movablepart and having a socket-piece, an arm adj ustably mounted in saidsocket-piece, a trip-plate having a socket-piece adjustably mounted onsaid arm and bearing a trip, a trip-lever having a pawl located in thepath of movement of said trip, an alarm, a striker therefor, andconnections between said striker and trip-lever.

12. In an alarm device, a trip-plate provided with means for attachmentto a movable member and having a trip, a trip-lever,

ITO

a pawl yieldingly mounted on the trip-lever and movable lengthwisethereof in one direction of movement of the trip but unyieldingindependently of the lever in the movement of the trip in the op ositedirection, a stop for holding the pawl disengaged from the trip, analarm, a striker therefor, and connections between the trip-lever andstriker.

13. In an alarm device, a trip-plate provided with means for attachmentto a movable member and provided with a trip, a triplever, a pawlyieldingly mounted on the triplever and movable lengthwise thereof andpendently of the lever, in the movement of the trip 1n the oppositedirection, means to engage sald pawl in its rotative movement to ho d itdisengaged from the trip, an alarm, a striker therefor, and connectionsbetween the trip-lever and striker.

ISAAC WATKINS Witnesses: v

v -ARTHUh B. JENKINS,

LENA E. BERKOVITOH.

